A healthy 35-year old Belgian woman developed an acute febrile illness with headaches, arthralgias, myalgias, pain in the eyes, and diarrhea after mosquito bites during a 9-day stay in Brazil. 2 months later, she complained of acute dysuria with perineal and bilateral gluteal pain and numbness radiating to the posterior side of the right tight. She was treated with furadantin and miconazole gynaecological cream for cystitis and presumed vaginal mycosis. Cystoscopy was normal. Sus-pubian echography showed a post-mictional vesical residue of 350 ml.

On neurological examination, she had a right Lasègue’s sign with perineal tactile hypoesthesia and absent ankle tendon jerks. She did not have any lower limb motor weakness or sensory loss. Diagnostic assessment by pattern visual and posterior tibial nerve somatosensory evoked potentials, brain and lumbosacral magnetic resonance imaging was unremarkable. Nerve conduction studies were normal in the right motor peroneal and tibial nerves, as...

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The authors declare that they have no conflict of interest.

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The authors declare that they acted in accordance with the ethical standards laid down in the 1964 declaration of Helsinki. This article does not contain any studies with human participants by any of the authors.